most of the answers are right above your head ^^^^ :thumbsup:

I believe...

this can help: http://boards.cannabis.com/indoor-li...-lighting.html

and
this can help: http://boards.cannabis.com/indoor-li...uch-light.html

and
this can help: http://boards.cannabis.com/indoor-li...ut-please.html

oh, this might help:
Quote Originally Posted by justanotherbozo
The Cost to Run a Lighting System
To get the operating cost per hour for a light, take the lights combined wattage, and divide it by 1000 to get the kilowatts used. Then multiply that number by the amount your electric company charges per kilowatt hour. HID lights will use the number of watts it emits per hour, ie; 600w system will use 600 watts per hour (regardless of spectrum).
(light wattage output / 1000) x electricity cost per kilowatt hour = Operating cost per hour
operating cost per hour x hours used per month = Operating cost per month
Did that help? :jointsmile: